Wheel-tire.



PATENTED MAY 7, 1907. J. A. SWINEHART.

WHEE RE.

APPLIIOATION r1 00T. 25, 1905.

' r IHVENTOR.

ATTY

JAMES A. SWINEHARTTO F AKRON, OHIO.

\NHEEL TlflEn Specification of Letters Patent.

Patented May 7, 1907.

' Application filed October 25, 1905. Serial No- 284,380.

To all when it may concern: I

Be it known that I, JAMEs A. SWINEI-IART, a citizen of the UnitedStates, residing at Akron, in the county of Summit and State of Ohio,have invented certain new and useful Improvements in YVheel-Tires and Ido declare that the following is a full, clear, and exact description ofthe invention, which will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to improvements in wheel tires, and the improvementconsists in the construction of the tire and in the means adapted tofasten the tire in place upon the wheel rim, all substantially as shownand described and more particularly pointed out in the claims.

My object is embodied in a novel form of tire and locking means thereforadapted to withstand hard usage and heavy loads and yet provide anexceptionally resilient tread, and also adapted to prevent the breakingof the cross wires when smaller sized wires are used, and the cutting ofthe tire. by the longitudinal wires.

In the accompanying drawings Figure 1 is a cross section and perspectiveview of a portion of a tire and wheel rim embodying my improvement. Fig.2 is a cross section of a slightly modified form of the tire shown inFig. 1, and Fig. 3 is a similar view showing a further slightmodification. Fig. 4 is a detail of the connecting nut. for the meetingI ends of a longitudinal locking wire.

Preliminary to a detailed description of my improvement, I wish to statethat I am aware that certain features of construction shown by me arenotnew but are such as are in common use. Thus, referring to the drawings,it is seen that a tire A having cross wires 2 within its base is notnew, nor am I the first to use longitudinal wires 3 adapted to rest uponthe ends of cross wires 2 to lock the tire in place within. channel rimB. Others have also employed a centrally located wire 4 to preventbuckling of cross wires 3. But I believe it is novel and original withme to provide tire A with a peripheral groove 6 axially in line withwire 4, whereby the cutting of the tire by wire 4 is prevented and thelife and durability of the tire is prolonged and its carrying capacityincreased. Further, a wide tire thus centrally divided by groove 6provides for a more resilient tread than if made Without.

In practice, it has been found that when side wires 3 are brought toplace over the ends of cross wires 2, said cross wires Wlll naturallybuckle or bow upwardly centrally between their ends. The wheel in itsrevolution brings the weight centrally upon the cross wires andobviously bonds or straightens them at each revolution. This repeatedbending of the wire crystallizes the same and the wire breaks and allowsthe tire to puffup in the center and draw away from the rim. To preventthis it has been customary to employ extremely heavy cross wires 2 whichwould partially remedy the trouble. Heavy cross wires 2 dis lace toomuch rubber and impair the strength of the tire. A central wire 4permits the use of light and. small sized cross wires, but a centrallongitudinal wire 4 is in the direct line of load in all knownconstructions and cuts the tire from wire to surface within shortperiods of service. A central groove 6 localizes the load at-twoperipheral points upon the tire, one at each side of said groove, andthe pressure upon cross wires 2 is also distributed at equal oints ateach side of its center which fact I alone would obviate buckling ofcross wires 2. But in extremely wide tires, a central locking member,such as wire 4, is found necessary and when used with groove 6 alldanger of cutting of the tire by wire 4 is eliminated, because thestrain or pressure is relieved from the tire at this point. Lockingmember or wire 4 may be embedded within tire A in line with groove 6, asin Fig. 2, or laid within groove 6 itself, as seen in Figs. 1 and 3. Thelatter mode is the most practicable and preferred because of itsconvenience in rcmovably securing the tire upon rim B, and to this endwire 4 has its meeting ends reverscly threaded and adapted to beconnected and drawn together by nut 8, shown in Fig. 4.

In Fig. 1 groove 6 is formed to stop short of cross wires 2 and therebyleave a certain amount of stock 9 between wire 4 and wires 2, whereas inFig. 3 groove 6 is deep enough to reach cross wire 2 and permit wire 4to directly rest upon the same. Side wires 3 are adapted to rest uponribs 15 formed at each side of tire A near its base, and cross wires 2extend through from side to side of said tire through said ribs. Centralwire 4 may be substituted by a cable or r0 e and if rope were used itwould probably be of larger diameter and more fully fill the groove thanthe wire.

What I claim is 1. As a new article of manufacture and sale, a solidrubber tire having separate circumferential tread portions spaced apartand cross wires embedded Within the base of said tire, longitudinalwires engaging over the ends of said cross wires, and means engagingsaid. cross wires at the middle of said tire transversely.

2. As an article ofmanufacture and sale, a solid rubber tire havingseparate eircumfer ential tread portions and a'groove between saidportions, cross wires within the base of said tire, and acircumferential locking wire in the plane of said groove and above saidcross wires.

3. A solid rubber tire having a circumferential groove in its perj heryand cross wires Within its base, in com 11311011 with a wheel rim, and alongitudinal locking member adapted to lie within said groove and holdsai tire u on said rim.

4:. A so id rubber tire having separated tread portions, and cross wiresfor said tire, in combination with a wheel rim adapted to seat saidtire, side locking members or said tire and rim, and a central lockingmember adapted to lock said tire centrally between the sides of saidrim.

5. The combination with a wheel felly and a multiple tread tire mountedthereon, said tire having cross-pins embedded in its base portion, of afastening wire surrounding said tire and lying between adjacent treadportions thereof.

In testimony whereof I sign this specification in the presence of twowitnesses.

JAMES A. SWINEHART.

